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Hi,

with CI, how to know if a specific view was loaded previously?

What do you mean?

I have a view that can be called in any place of controller or another view, and to prevent it being called again I wanna check if this view was loaded previously.

Not easily.

Check the results of

print_r($this->load);

(or even better use a stepping debugger)
in a controller to see what the loader class keeps track of.  It does track loaded classes/models/helpers/cached_variables and a few other things, but not views specifically.  There is another tracked category for loaded_files, but I don’t think it shows view files either (shows config files, etc).

I think you might be able to throw a

define('VIEW_LOADED', TRUE);

in there when you do load that view, and check to see if VIEW_LOADED is defined in the other places where you need to check for it.

if ( ! defined('VIEW_LOADED'))
{
  $this->load->view('your_view');
  define('VIEW_LOADED', TRUE);
}

You could also easily extend the loader class to track called views as well.

You could easily extend the view method of the Loader class. Each time a view is loaded, add it to a new class member (array with public access). Then, at any point you could check if that array is holding the view as an element.